Help finding a horror movie

I saw the video and did not remember the name ...
The girl is sitting in the toilet and hears that they are having sex in the next booth, then they start to choke, she sees their legs below. He goes into the next booth, but there is no one there. He comes back to himself, and again sees his legs. Takes the phone and fotkaet what is happening there. He looks at the photo, and there she is. And from above, someone terrible looks at her.